KUALA LUMPUR — Former prime minister Tony Blair’s sister-in-law Lauren Booth, a rights campaigner and Muslim convert, said on Wednesday that he should be tried for war crimes over the invasion of Iraq.

Booth, the half-sister of Blair’s barrister wife Cherie, is in Malaysia for lectures organised by Viva Palestina, a British-based organisation associated with controversial politician George Galloway.

Asked whether Blair should be arrested and sent to the International Court of Justice in The Hague for war crimes, Booth replied: “Absolutely. He misled the British people and took Britain to war on a lie.”